[Sprite setString:]:unrecognized selector sent to instance & malloc_error_break

[francis]

i have this app like doodlejump then i added monsters and projectiles and i have finished it

however im getting this 2 crashes.. one(sometimes) when the app opens this occurs :

[Sprite setString:]: unrecognized selector sent to instance

and the other is when i fire many projectiles this occurs:

malloc: *** error for object 0x5e99f00: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

i really dont know what to do now...

here's my game.m

- (id)init {
//      NSLog(@"Game::init");

        if(![super init]) return nil;

        gameSuspended = YES;

        AtlasSpriteManager *spriteManager = (AtlasSpriteManager*)[self getChildByTag:kSpriteManager];

        [self initPlatforms];

        AtlasSprite *bird = [AtlasSprite spriteWithRect:CGRectMake(608,16,44,32) spriteManager:spriteManager];
        [spriteManager addChild:bird z:4 tag:kBird];

        AtlasSprite *bonus;

        for(int i=0; i<kNumBonuses; i++) {
                bonus = [AtlasSprite spriteWithRect:CGRectMake(608+i*32,256,25,25) spriteManager:spriteManager];
                [spriteManager addChild:bonus z:4 tag:kBonusStartTag+i];
                bonus.visible = NO;
        }

//      LabelAtlas *scoreLabel = [LabelAtlas labelAtlasWithString:@"0" charMapFile:@"charmap.png" itemWidth:24 itemHeight:32 startCharMap:' '];
//      [self addChild:scoreLabel z:5 tag:kScoreLabel];

        BitmapFontAtlas *scoreLabel = [BitmapFontAtlas bitmapFontAtlasWithString:@"0" fntFile:@"bitmapFont.fnt"];
        [self addChild:scoreLabel z:5 tag:kScoreLabel];
        scoreLabel.position = ccp(160,430);

        [self schedule:@selector(step:)];
        [self schedule:@selector(update:)];

        isTouchEnabled = YES;
        isAccelerometerEnabled = YES;

        [[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / kFPS)];

        [self startGame];
        [self schedule:@selector(gameLogic:) interval:5.0];

        _targets = [[NSMutableArray alloc]init];
        _projectiles = [[NSMutableArray alloc]init];

        return self;
}

-(void)addTarget {

        Sprite *target = [Sprite spriteWithFile:@"komodo.png"];

        target.position = ccp(300,200);

        [self addChild:target];

        CGSize winSize = [[Director sharedDirector]winSize];
        int minX = target.contentSize.height/2;
        int maxX = winSize.height -target.contentSize.height/2;
        int rangeX = maxX - minX;
        int actualX = (arc4random() % rangeX) +minX;

        int minDuration = 2.0;
        int maxDuration = 4.0;
        int rangeDuration = maxDuration - minDuration;
        int actualDuration = (arc4random() % rangeDuration) + minDuration;

        id actionMove = [MoveTo actionWithDuration:actualDuration position:ccp(-target.contentSize.width,actualX)];
        id actionMoveDone = [CallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)];
        [target runAction:[Sequence actions:actionMove, actionMoveDone,nil]];
        target.tag = 1;
        [_targets addObject:target];

}

-(void)spriteMoveFinished:(id)sender {

        Sprite *sprite = (Sprite *)sender;
        [self removeChild:sprite cleanup:YES];

        if (sprite.tag == 1) {
                [_targets removeObject:sprite];

        } else if (sprite.tag == 2) {
                [_projectiles removeObject:sprite];
        }
}
-(void)gameLogic:(ccTime)dt {
        [self addTarget];

}

-(void) update:(ccTime)dt {
        AtlasSpriteManager *spriteManager = (AtlasSpriteManager*)[self getChildByTag:kSpriteManager];
        AtlasSprite *bird = (AtlasSprite *) [spriteManager getChildByTag:kBird];

        CGRect birdRect = CGRectMake(bird.position.x - (bird.contentSize.width/2), bird.position.y - (bird.contentSize.height/2), bird.contentSize.width/1.8,bird.contentSize.height/1.5);

        NSMutableArray *targetsToDelete = [[NSMutableArray alloc]init];
    for (Sprite *target in _targets) {
                CGRect targetRect = CGRectMake(
                                                                           target.position.x - (target.contentSize.width/2),
                                                                           target.position.y - (target.contentSize.height/2),
                                                                           target.contentSize.width,
                                                                           target.contentSize.height);

                        NSMutableArray *projectilesToDelete = [[NSMutableArray alloc]init];
                        for(Sprite *projectile in _projectiles) {
                                CGRect projectileRect = CGRectMake(projectile.position.x - (projectile.contentSize.width/2),projectile.position.y - (projectile.contentSize.height/2), projectile.contentSize.width, projectile.contentSize.height);

                                if(CGRectIntersectsRect(birdRect,targetRect)) {
                                        NSLog(@"HIT!");
                                        gameSuspended = YES;
                                        [self showHighscores];
                                }

                                if(CGRectIntersectsRect(targetRect,projectileRect )) {
                                NSLog(@"Boom Boom Pow");
                                        [targetsToDelete addObject:target];
                                }

                        for (Sprite *target in targetsToDelete) {
                                [_targets removeObject:target];
                                [self removeChild:target cleanup:YES];
                        }
                        if(targetsToDelete.count > 0) {
                                [projectilesToDelete addObject:projectile];
                        }
                        [targetsToDelete release];
                }
                for(Sprite *projectile in projectilesToDelete) {
                        [_projectiles removeObject:projectile];
                        [self removeChild:projectile cleanup:YES];
                }
                [projectilesToDelete release];

                }
        }

-(void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
        AtlasSpriteManager *spriteManager = (AtlasSpriteManager*)[self getChildByTag:kSpriteManager];
        AtlasSprite *bird = (AtlasSprite*)[spriteManager getChildByTag:kBird];

        UITouch *touch = [touches anyObject];
        CGPoint location = [touch locationInView:[touch view]];
        location = [[Director sharedDirector]convertCoordinate:location];

        CGSize winSize = [[Director sharedDirector]winSize];
        Sprite *projectile = [Sprite spriteWithFile:@"bullet.png"];
        projectile.position = ccp(bird.position.x,bird.position.y);

        int offX = location.x - projectile.position.x;
        int offY = location.y - projectile.position.y;

        [self addChild:projectile];

        int realX = winSize.width + (projectile.contentSize.width/2);
        float ratio = (float) offY / (float) offX;
        int realY = (realX *ratio) + projectile.position.y;
        CGPoint realDest = ccp(realX, realY);

        int offRealX = realX - projectile.position.x;
        int offRealY = realY - projectile.position.y;
        float length = sqrtf((offRealX*offRealX)+(offRealY*offRealY));
        float velocity = 480/1;
        float realMoveDuration = length/velocity;

        [projectile runAction:[Sequence actions:[MoveTo actionWithDuration:realMoveDuration position:realDest],
                                                   [CallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)], nil]];
        NSLog(@"Shoot!");
        projectile.tag = 2;
        [_projectiles addObject:projectile];

}

i badly need help. because i have been working on this for days then when i finally finished it

this crashes appear.... :c hope pro's would look and answer THANKS SO MUCH